[Libreoffice-bugs] [Bug 85761] Exporting jpeg format from DRAW, resolution does not follow options setting

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=85761

--- Comment #6 from Chris Sherlock  ---
Unless I'm much mistaken, the Graphics class has no way of getting either the
physical size of the graphics image in mm/inches, or alternatively has no way
of returning the pixels per inch from which you could extrapolate the physical
size...

http://opengrok.libreoffice.org/xref/core/include/vcl/graph.hxx#109

This seems like a bit of a shortcoming in this class? Is that something we
should consider adding?

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[Libreoffice-bugs] [Bug 85761] Exporting jpeg format from DRAW, resolution does not follow options setting

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=85761

--- Comment #7 from Chris Sherlock  ---
OK, about to submit a proposed patch to gerrit.

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[Libreoffice-bugs] [Bug 85761] Exporting jpeg format from DRAW, resolution does not follow options setting

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=85761

--- Comment #8 from Chris Sherlock  ---
Asking for a review on Gerrit:

https://gerrit.libreoffice.org/22339

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[Libreoffice-bugs] [Bug 85761] Exporting jpeg format from DRAW, resolution does not follow options setting

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=85761

Chris Sherlock  changed:

   What|Removed |Added

   Assignee|libreoffice-b...@lists.free |chris.sherloc...@gmail.com
   |desktop.org |

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[Libreoffice-bugs] [Bug 85761] Exporting jpeg format from DRAW, resolution does not follow options setting

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=85761

--- Comment #5 from MM  ---
(In reply to Regina Henschel from comment #2)

> But when you look at the stored dpi, as reported by a picture viewer like
> IrfanView, then you can see the value 96 dpi. The effect is, that other
> application will calculate a wrong width for this image. You can correct the
> value to 300 dpi in IrfanView and all is OK.
> 

Well, that might seems to be a result of the patch from bug 65695.
Instead of taking the dpi from the resolution setting (which is 96 by default
anyway [correct my if i'm wrong]), it seems hardcoded to 96.

--> tdf#65695 write density 96 DPI to JPEG files at compression 

https://cgit.freedesktop.org/libreoffice/core/commit/?id=d0d8e0a2a7244814f783f16c6c8b342fe6d16e79

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[Libreoffice-bugs] [Bug 85761] Exporting jpeg format from DRAW, resolution does not follow options setting

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=85761

Regina Henschel  changed:

   What|Removed |Added

 CC||yanp...@gmail.com

--- Comment #4 from Regina Henschel  ---
*** Bug 97481 has been marked as a duplicate of this bug. ***

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[Libreoffice-bugs] [Bug 85761] Exporting jpeg format from DRAW, resolution does not follow options setting

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=85761

Regina Henschel  changed:

   What|Removed |Added

 Status|RESOLVED|NEW
 CC||rb.hensc...@t-online.de
 Resolution|DUPLICATE   |---
 Ever confirmed|0   |1

--- Comment #2 from Regina Henschel  ---
It is not duplicate to bug 37678. Bug 37678 is about the behavior of the fields
in the dialog.

To reproduce this bug do this:
Open the attached file. It has 10cm width and 14cm height.
File > Export
Select file type jpeg.
In the export dialog make the following settings in this order:
   Set Quality to 100
   Set Resolution to 300 pixel/inch
   Set width to 10cm.
Save

This setting should result (besides rounding errors) in
width: (10 / 2.54) * 300 =  1181 Pixel
height: (14 / 2.54) * 300 = 1654 Pixel
Indeed, the exported image has the size (w x h): 1183 x 1656.

But when you look at the stored dpi, as reported by a picture viewer like
IrfanView, then you can see the value 96 dpi. The effect is, that other
application will calculate a wrong width for this image. You can correct the
value to 300 dpi in IrfanView and all is OK.

LO 4.2 had not written any dpi into the file, so there it was wrong too.

Expected behavior: The resolution, which was used for generating the pixels for
export, should be written into the file. Jpeg allows such information.

BTW: The export to png does not have this problem, in png-export the dpi value
is correctly written.

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[Libreoffice-bugs] [Bug 85761] Exporting jpeg format from DRAW, resolution does not follow options setting

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=85761

--- Comment #3 from Regina Henschel  ---
Created attachment 121172
  --> https://bugs.documentfoundation.org/attachment.cgi?id=121172=edit
File to be exported

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[Libreoffice-bugs] [Bug 85761] Exporting jpeg format from DRAW, resolution does not follow options setting

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=85761

Beluga todven...@suomi24.fi changed:

   What|Removed |Added

 Status|UNCONFIRMED |RESOLVED
 CC||todven...@suomi24.fi
 Resolution|--- |DUPLICATE

--- Comment #1 from Beluga todven...@suomi24.fi ---


*** This bug has been marked as a duplicate of bug 37678 ***

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